Pierre traveled down a canal by barge from the town of portage (elevations 726 feet) to the town of barrage (elevation 626 feet). on the way, he had to pass through a series of locks. if each lowered the garage 20 feet, how many locks did he pass through?

9.4.34  question   to estimate the height of a stone  figure, an observer holds a small square up to her eyes and walks backward from the figure. she stops when the bottom of the figure aligns with the bottom edge of the  square, and when the top of the figure aligns with the top edge of the square. her eye level is 1.811.81 m from the ground. she is 3.703.70 m from the figure. what is the height of the figure to the nearest hundredth of a  meter?